Grease fitting not taking grease

Yes

 

Yes but they also make a tool to clean them out.

I recommend this one -

https://www.zerkzapper.com/

 

Yeah that happens. Some places it might not be a big deal but I'd just replace the zerks anyway

 

Seems you heat them up cherry red with a torch and they'll start working.
Take them off truck first

 

I use one of these on zerk that sometimes don't want to take grease. If I ever have one that the grease squirts out of and it is on a u-joint with two fittings I will go to the opposite zerk and pump grease in while holding my finger over the one that was oozing out and sometimes it will stop it. If not just replace it. Harbor Freight sells a zerk fitting set with various sizes.

 

just change the fitting, they get sand n dirt in them

 

You can buy alot of new fittings for 35 bucks

 

If it's just that the zerk's bad, that's easy, just change it out....Now, if the grease inside the fitting/pin has fossilized, that's gonna require some heat and some penetrating oil to get things flowing again....Be careful with the heat too...